Unable to Create Page

I have tried diligently to find answer on my own but have not been able to, hopefully someone can point me in the right direction.

Blog is webolutionnow.familythrive.com

I have until today been able to add pages. I created a page “Sitemap” page and the odd thing is when I create it and click on “Save and Continue Editing” in the preview window it looks fine. However once I publish the page or save after this first save I get a 404.

Htaccess looks like this:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

The other odd thing is that when you click on page link I create “Sitemap” I get a 404 page but not the 404 for my WP template the default one for the server. So something is funky with pathes or perhaps my permalink or perhaps since I am hosting my blog on a subdomain.

Today I have also installed the following plugins:

Dagon Design Sitemap Generator and Google XML Sitemaps and All in One SEO Pack. I have deactivated each of these and tested if that made a difference and it did not seem to. I am pretty sure one of these must be the culprit.

Any suggestions would be much appreciated.